Mobile device and optical imaging lens thereof

ABSTRACT

Present embodiments provide for a mobile device and an optical imaging lens thereof. The optical imaging lens comprises six lens elements positioned sequentially from an object side to an image side. Through controlling the convex or concave shape of the surfaces and/or the refracting power of the lens elements, the optical imaging lens shows better optical characteristics and the total length of the optical imaging lens is shortened.

INCORPORATION BY REFERENCE

This application claims priority from P.R.C. Patent Application No.201310402978.6, filed on Sep. 6, 2013, the contents of which are herebyincorporated by reference in their entirety for all purposes.

TECHNICAL FIELD

The present invention relates to a mobile device and an optical imaginglens thereof, and particularly, relates to a mobile device applying anoptical imaging lens having six lens elements and an optical imaginglens thereof.

BACKGROUND

The ever-increasing demand for smaller sized mobile devices, such ascell phones, digital cameras, etc. correspondingly triggered a growingneed for a smaller sized photography module, comprising elements such asan optical imaging lens, a module housing unit, and an image sensor,etc., contained therein. Size reductions may be contributed from variousaspects of the mobile devices, which includes not only the chargecoupled device (CCD) and the complementary metal-oxide semiconductor(CMOS), but also the optical imaging lens mounted therein. When reducingthe size of the optical imaging lens, however, achieving good opticalcharacteristics becomes a challenging problem.

The length of conventional optical imaging lenses comprising four lenselements can be limited in a certain range; however, as the more andmore demands in the market for high-end products, high-standard opticalimaging lenses which show great quality with more pixels with six lenselements are required. U.S. Pat. No. 8,345,354 and R.O.C. PatentPublication No. 201250283 both disclosed an optical imaging lensconstructed with an optical imaging lens having six lens elements,wherein the length of the optical imaging lens, which, from theobject-side surface of the first lens element to the image plane, aretoo long for smaller sized mobile devices. Therefore, there is needed todevelop optical imaging lens which is capable to place with six lenselements therein, with a shorter length, while also having good opticalcharacters.

SUMMARY

An object of the present invention is to provide a mobile device and anoptical imaging lens thereof. With controlling the convex or concaveshape of the surfaces and/or the refracting power of the lens elements,the length of the optical imaging lens is shortened and meanwhile thegood optical characters, and system functionality are sustained.

In an exemplary embodiment, an optical imaging lens comprises,sequencially from an object side to an image side along an optical axis,comprises a first lens element, an aperture stop, and second, third,fourth and fifth lens elements, each of the first, second, third,fourth, fifth and sixth lens elements having refracting power, anobject-side surface facing toward the object side and an image-sidesurface facing toward the image side, wherein: the object-side surfaceof the first lens element comprises a convex portion in a vicinity ofthe optical axis; the image-side surface of the second lens elementcomprises a convex portion in a vicinity of a periphery of the secondlens element; the third lens element has negative refracting power; theimage-side surface of the fourth lens element comprises a convex portionin a vicinity of a periphery of the fourth lens element; and theimage-side surface of the sixth lens element comprises a concave portionin a vicinity of the optical axis and a convex portion in a vicinity ofa periphery of the sixth lens element; the optical imaging lens as awhole comprises only the six lens elements having refracting power.

In another exemplary embodiment, other equation (s), such as thoserelating to the ratio among parameters could be taken intoconsideration. For example, a central thickness of the third lenselement along the optical axis, CT3, a central thickness of the fourthlens element along the optical axis, CT4, and an air gap between thethird lens element and the fourth lens element along the optical axis,AC34, could be controlled to satisfy the equation as follows:

2.20≦(CT4+AC34)/CT3  Equation (1); or

AC34, an air gap between the fourth lens element and the fifth lenselement along the optical axis, AC45, and an air gap between the fifthlens element and the sixth lens element along the optical axis, AC56,could be controlled to satisfy the equation as follows:

1.00≦AC34/(AC45+AC56)  Equation (2); or

AC34, a central thickness of the first lens element along the opticalaxis, CT1, and a central thickness of the sixth lens element along theoptical axis, CT6, could be controlled to satisfy the equation asfollows:

2.00≦(CT1+AC34)/CT6  Equation (3); or

AC34 and CT3 could be controlled to satisfy the equation as follows:

1.60≦AC34/CT3  Equation (4); or

CT4, CT6 and a central thickness of the second lens element along theoptical axis, CT2, could be controlled to satisfy the equation asfollows:

2.48≦(CT2+CT4)/CT6  Equation (5); or

AC34 and an air gap between the second lens element and the third lenselement along the optical axis, AC23, could be controlled to satisfy theequation as follows:

3.30≦AC34/AC23  Equation (6); or

CT1, CT2 and CT6 could be controlled to satisfy the equation as follows:

2.00≦(CT1+CT2)/CT6  Equation (7); or

CT6 and AC34 could be controlled to satisfy the equation as follows:

1.00≦AC34/CT6  Equation (8); or

CT1, CT3 and AC34 could be controlled to satisfy the equation asfollows:

2.20≦(CT1+AC34)/CT3  Equation (9); or

AC45 and an air gap between the first lens element and the second lenselement along the optical axis, AC12, could be controlled to satisfy theequation as follows:

0.90≦AC12/AC45  Equation (10); or

CT2, CT4 and a central thickness of the fifth lens element along theoptical axis, CT5, could be controlled to satisfy the equation asfollows:

1.70≦(CT2+CT4)/CT5  Equation (11); or

CT1, CT5 and AC34 could be controlled to satisfy the equation asfollows:

1.80≦(CT1+AC34)/CT5  Equation (12); or

2.20≦(CT1+AC34)/CT5  Equation (12′); or

AC23, AC34 and AC56 could be controlled to satisfy the equation asfollows:

1.80≦AC34/(AC23+AC56)  Equation (13); or

CT5 and AC34 could be controlled to satisfy the equation as follows:

1.00≦AC34/CT5  Equation (14); or

CT4, AC23 and AC56 could be controlled to satisfy the equation asfollows:

1.00≦CT4/(AC23+AC56)  Equation (15); or

CT2, CT3 and AC34 could be controlled to satisfy the equation asfollows:

2.80≦(CT2+AC34)/CT3  Equation (16); or

CT1, CT4 and CT5 could be controlled to satisfy the equation as follows:

1.80≦(CT1+CT4)/CT5  Equation (17).

Aforesaid exemplary embodiments are not limited and could be selectivelyincorporated in other embodiments described herein.

In some exemplary embodiments, more details about the convex or concavesurface structure could be incorporated for one specific lens element orbroadly for plural lens elements to enhance the control for the systemperformance and/or resolution. It is noted that the additional detailscould be incorporated in example embodiments if no inconsistency occurs.

In another exemplary embodiment, a mobile device comprising a housingand a photography module positioned in the housing is provided. Thephotography module comprises any of aforesaid example embodiments ofoptical imaging lens, a lens barrel, a module housing unit and an imagesensor. The lens barrel is for positioning the optical imaging lens, themodule housing unit is for positioning the lens barrel, the substrate isfor positioning the module housing unit; and the image sensor ispositioned at the image side of the optical imaging lens.

Through controlling the convex or concave shape of the surfaces and/orthe refracting power of the lens element(s), the mobile device and theoptical imaging lens thereof in exemplary embodiments achieve goodoptical characters and effectively shorten the length of the opticalimaging lens.

BRIEF DESCRIPTION OF THE DRAWINGS

Exemplary embodiments will be more readily understood from the followingdetailed description when read in conjunction with the appended drawing,in which:

FIG. 1 is a cross-sectional view of one single lens element according tothe present disclosure;

FIG. 2 is a cross-sectional view of a first embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 3 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a first embodiment of the optical imaging lensaccording to the present disclosure;

FIG. 4 is a table of optical data for each lens element of a firstembodiment of an optical imaging lens according to the presentdisclosure;

FIG. 5 is a table of aspherical data of a first embodiment of theoptical imaging lens according to the present disclosure;

FIG. 6 is a cross-sectional view of a second embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 7 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a second embodiment of the optical imaginglens according to the present disclosure;

FIG. 8 is a table of optical data for each lens element of the opticalimaging lens of a second embodiment of the present disclosure;

FIG. 9 is a table of aspherical data of a second embodiment of theoptical imaging lens according to the present disclosure;

FIG. 10 is a cross-sectional view of a third embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 11 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a third embodiment of the optical imaging lensaccording the present disclosure;

FIG. 12 is a table of optical data for each lens element of the opticalimaging lens of a third embodiment of the present disclosure;

FIG. 13 is a table of aspherical data of a third embodiment of theoptical imaging lens according to the present disclosure;

FIG. 14 is a cross-sectional view of a fourth embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 15 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a fourth embodiment of the optical imaginglens according the present disclosure;

FIG. 16 is a table of optical data for each lens element of the opticalimaging lens of a fourth embodiment of the present disclosure;

FIG. 17 is a table of aspherical data of a fourth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 18 is a cross-sectional view of a fifth embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 19 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a fifth embodiment of the optical imaging lensaccording the present disclosure;

FIG. 20 is a table of optical data for each lens element of the opticalimaging lens of a fifth embodiment of the present disclosure;

FIG. 21 is a table of aspherical data of a fifth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 22 is a cross-sectional view of a sixth embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 23 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a sixth embodiment of the optical imaging lensaccording the present disclosure;

FIG. 24 is a table of optical data for each lens element of the opticalimaging lens of a sixth embodiment of the present disclosure;

FIG. 25 is a table of aspherical data of a sixth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 26 is a cross-sectional view of a seventh embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 27 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a seventh embodiment of the optical imaginglens according the present disclosure;

FIG. 28 is a table of optical data for each lens element of the opticalimaging lens of a seventh embodiment of the present disclosure;

FIG. 29 is a table of aspherical data of a seventh embodiment of theoptical imaging lens according to the present disclosure;

FIG. 30 is a cross-sectional view of an eighth embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 31 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of an eighth embodiment of the optical imaginglens according the present disclosure;

FIG. 32 is a table of optical data for each lens element of the opticalimaging lens of an eighth embodiment of the present disclosure;

FIG. 33 is a table of aspherical data of an eighth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 34 is a cross-sectional view of a ninth embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 35 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a ninth embodiment of the optical imaging lensaccording the present disclosure;

FIG. 36 is a table of optical data for each lens element of the opticalimaging lens of a ninth embodiment of the present disclosure;

FIG. 37 is a table of aspherical data of a ninth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 38 is a cross-sectional view of a tenth embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 39 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a tenth embodiment of the optical imaging lensaccording the present disclosure;

FIG. 40 is a table of optical data for each lens element of the opticalimaging lens of a tenth embodiment of the present disclosure;

FIG. 41 is a table of aspherical data of a tenth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 42 is a table for the values of (CT4+AC34)/CT3, AC34/(AC45+AC56),(CT1+AC34)/CT6, AC34/CT3, (CT2+CT4)/CT6, AC34/AC23, (CT1+CT2)/CT6,AC34/CT6, (CT1+AC34)/CT3, AC12/AC45, (CT2+CT4)/CT5, (CT1+AC34)/CT5,AC34/(AC23+AC56), AC34/CT5, CT4/(AC23+AC56), (CT2+AC34)/CT3 and(CT1+CT4)/CT5 of all ten example embodiments;

FIG. 43 is a structure of an example embodiment of a mobile device;

FIG. 44 is a partially enlarged view of the structure of another exampleembodiment of a mobile device.

DETAILED DESCRIPTION

For a more complete understanding of the present disclosure and itsadvantages, reference is now made to the following description taken inconjunction with the accompanying drawings, in which like referencenumbers indicate like features. Persons having ordinary skill in the artwill understand other varieties for implementing example embodiments,including those described herein. The drawings are not limited tospecific scale and similar reference numbers are used for representingsimilar elements. As used in the disclosures and the appended claims,the terms “example embodiment,” “exemplary embodiment,” and “presentembodiment” do not necessarily refer to a single embodiment, although itmay, and various example embodiments may be readily combined andinterchanged, without departing from the scope or spirit of the presentinvention. Furthermore, the terminology as used herein is for thepurpose of describing example embodiments only and is not intended to bea limitation of the invention. In this respect, as used herein, the term“in” may include “in” and “on”, and the terms “a”, “an” and “the” mayinclude singular and plural references. Furthermore, as used herein, theterm “by” may also mean “from”, depending on the context. Furthermore,as used herein, the term “if” may also mean “when” or “upon”, dependingon the context. Furthermore, as used herein, the words “and/or” mayrefer to and encompass any and all possible combinations of one or moreof the associated listed items.

Here in the present specification, “a lens element having positiverefracting power (or negative refracting power)” means that the lenselement has positive refracting power (or negative refracting power) inthe vicinity of the optical axis. “An object-side (or image-side)surface of a lens element comprises a convex (or concave) portion in aspecific region” means that the object-side (or image-side) surface ofthe lens element “protrudes outwardly (or depresses inwardly)” along thedirection parallel to the optical axis at the specific region, comparedwith the outer region radially adjacent to the specific region. TakingFIG. 1 for example, the lens element shown therein is radially symmetricaround the optical axis which is labeled by I. The object-side surfaceof the lens element comprises a convex portion at region A, a concaveportion at region B, and another convex portion at region C. This isbecause compared with the outer region radially adjacent to the region A(i.e. region B), the object-side surface protrudes outwardly at theregion A, compared with the region C, the object-side surface depressesinwardly at the region B, and compared with the region E, theobject-side surface protrudes outwardly at the region C. Here, “in avicinity of a periphery of a lens element” means that in a vicinity ofthe peripheral region of a surface for passing imaging light on the lenselement, i.e. the region C as shown in FIG. 1. The imaging lightcomprises chief ray Lc and marginal ray Lm. “In a vicinity of theoptical axis” means that in a vicinity of the optical axis of a surfacefor passing the imaging light on the lens element, i.e. the region A asshown in FIG. 1. Further, a lens element could comprise an extendingportion E for mounting the lens element in an optical imaging lens.Ideally, the imaging light would not pass the extending portion E. Herethe extending portion E is only for example, the structure and shapethereof are not limited to this specific example. Please also noted thatthe extending portion of all the lens elements in the exampleembodiments shown below are skipped for maintaining the drawings cleanand concise.

In the present invention, examples of an optical imaging lens which is aprime lens are provided. Example embodiments of an optical imaging lensmay comprise a first lens element, an aperture stop, a second lenselement, a third lens element, a fourth lens element, a fifth lenselement and a sixth lens element, each of the lens elements hasrefracting power and comprises an object-side surface facing toward anobject side and an image-side surface facing toward an image side. Theselens elements may be arranged sequencially from the object side to theimage side along an optical axis, and example embodiments of the lens asa whole may comprise only the six lens elements having refracting power.In an example embodiment: the object-side surface of the first lenselement comprises a convex portion in a vicinity of the optical axis;the image-side surface of the second lens element comprises a convexportion in a vicinity of a periphery of the second lens element; thethird lens element has negative refracting power; the image-side surfaceof the fourth lens element comprises a convex portion in a vicinity of aperiphery of the fourth lens element; and the image-side surface of thesixth lens element comprises a concave portion in a vicinity of theoptical axis and a convex portion in a vicinity of a periphery of thesixth lens element.

Preferably, the lens elements are designed in light of the opticalcharacteristics and the length of the optical imaging lens. For example,the first lens element with the convex portion in a vicinity of theoptical axis formed on the object-side surface thereof can assist incollecting light to shorten the length of the optical imaging lens.Then, combining this with the aperture stop positioned between the firstand second lens elements as well as the negative refracting power of thethird lens element, the image quality is sustained. Further, combiningthese with the second lens element formed with the convex portion in avicinity of a periphery of the second lens element on the image-sidesurface thereof, the fourth lens element formed with the convex portionin a vicinity of a vicinity of a periphery of the fourth lens element onthe image-side surface thereof and the sixth lens element formed withthe concave portion in a vicinity of the optical axis and the convexportion in a vicinity of a periphery of the sixth lens element on theimage-side surface thereof, the aberration of the optical imaging lenscould be adjusted. Therefore, the image quality of the optical imaginglens could be further promoted.

In another exemplary embodiment, some equation (s) of parameters, suchas those relating to the ratio among parameters could be taken intoconsideration. For example, a central thickness of the third lenselement along the optical axis, CT3, a central thickness of the fourthlens element along the optical axis, CT4, and an air gap between thethird lens element and the fourth lens element along the optical axis,AC34, could be controlled to satisfy the equation as follows:

2.20≦(CT4+AC34)/CT3  Equation (1); or

AC34, an air gap between the fourth lens element and the fifth lenselement along the optical axis, AC45, and an air gap between the fifthlens element and the sixth lens element along the optical axis, AC56,could be controlled to satisfy the equation as follows:

1.00≦AC34/(AC45+AC56)  Equation (2); or

AC34, a central thickness of the first lens element along the opticalaxis, CT1, and a central thickness of the sixth lens element along theoptical axis, CT6, could be controlled to satisfy the equation asfollows:

2.00≦(CT1+AC34)/CT6  Equation (3); or

AC34 and CT3 could be controlled to satisfy the equation as follows:

1.60≦AC34/CT3  Equation (4); or

CT4, CT6 and a central thickness of the second lens element along theoptical axis, CT2, could be controlled to satisfy the equation asfollows:

2.48≦(CT2+CT4)/CT6  Equation (5); or

AC34 and an air gap between the second lens element and the third lenselement along the optical axis, AC23, could be controlled to satisfy theequation as follows:

3.30≦AC34/AC23  Equation (6); or

CT1, CT2 and CT6 could be controlled to satisfy the equation as follows:

2.00≦(CT1+CT2)/CT6  Equation (7); or

CT6 and AC34 could be controlled to satisfy the equation as follows:

1.00≦AC34/CT6  Equation (8); or

CT1, CT3 and AC34 could be controlled to satisfy the equation asfollows:

2.20≦(CT1+AC34)/CT3  Equation (9); or

AC45 and an air gap between the first lens element and the second lenselement along the optical axis, AC12, could be controlled to satisfy theequation as follows:

0.90≦AC12/AC45  Equation (10); or

CT2, CT4 and a central thickness of the fifth lens element along theoptical axis, CT5, could be controlled to satisfy the equation asfollows:

1.70≦(CT2+CT4)/CT5  Equation (11); or

CT1, CT5 and AC34 could be controlled to satisfy the equation asfollows:

1.80≦(CT1+AC34)/CT5  Equation (12); or

2.20≦(CT1+AC34)/CT5  Equation (12′); or

AC23, AC34 and AC56 could be controlled to satisfy the equation asfollows:

1.80≦AC34/(AC23+AC56)  Equation (13); or

CT5 and AC34 could be controlled to satisfy the equation as follows:

1.00≦AC34/CT5  Equation (14); or

CT4, AC23 and AC56 could be controlled to satisfy the equation asfollows:

1.00≦CT4/(AC23+AC56)  Equation (15); or

CT2, CT3 and AC34 could be controlled to satisfy the equation asfollows:

2.80≦(CT2+AC34)/CT3  Equation (16); or

CT1, CT4 and CT5 could be controlled to satisfy the equation as follows:

1.80≦(CT1+CT4)/CT5  Equation (17).

Aforesaid exemplary embodiments are not limited and could be selectivelyincorporated in other embodiments described herein.

Reference is now made to Equation (1). (CT4+AC34)/CT3 is formed by CT4,AC34, which potential to be shortened tend to be limited more, and CT3,which potential to be shortened tends to be limited less. The reason whythe shortening of CT4 and AC34 faces more limitation is that thenegative refracting power of the third lens element which requires awide air gap, AC34, for dispersing the light on a certain level whenentering the fourth lens element. Meanwhile, the diameter for passinglight in the fourth lens element is so big that the thickness of thefourth lens element has less potential to be shortened, but the diameterfor passing light in the third lens element is relatively small to allowa thinner thickness. The value of (CT4+AC34)/CT3 is suggested for alower limit to configure CT3, CT4 and AC34 properly, such as 2.20 tosatisfying Equation (1), and preferably, it is suggested to be within2.20˜7.80.

Reference is now made to Equation (2). As mentioned above, consideringthe shortening of AC has less potential, the shortening of AC45 has morepotential due to the convex portion in a vicinity of a periphery of thefourth lens element formed on the image-side surface thereof, andshortening AC56 with a great portion also assists in shortening thelength of the optical imaging lens, here the value of AC34/(AC45+AC56)is suggested for a lower limit to configure AC34, AC45 and AC56properly, such as 1.00 to satisfying Equation (2), and preferably, it issuggested to be within 1.00˜4.80.

Reference is now made to Equation (3). Considering the shortening of CT1is limited to the light collection required in the system and thelimitation of the shortening of AC34 as mentioned above, here theshortening of CT6 has more potential. Thus, the value of (CT1+AC34)/CT6is suggested for a lower limit to shorten the length of the opticalimaging lens, such as 2.00 to satisfying Equation (3), and preferably,it is suggested to be within 2.00˜6.30.

Reference is now made to Equation (4). Considering that the shorteningof AC34 has less potential and the shortening of CT3 has more potentialas mentioned above, the value of AC34/CT3 is suggested for a lower limitto configure the value of AC3 and CT3 properly, such as 1.60 to satisfyEquation (4), and preferably, it is suggested to be within 1.60˜3.60.

Reference is now made to Equation (5). Considering that the opticalcharacters and the manufacture difficulty of the optical imaging lens,here the value of (CT2+CT4)/CT6 is suggested for a lower limit toconfigure the value of CT2, CT4 and CT6 properly, such as 2.48 tosatisfying Equation (5), and preferably, it is suggested to be within2.48˜5.70.

Reference is now made to Equation (6). As mentioned before, consideringthat the shortening of AC34 has less potential and the shortening ofAC23 has more potential for the convex portion in a vicinity of aperiphery of the second lens element formed on the image-side surfacethereof, here the value of AC34/AC23 is suggested for a lower limit,such as 3.30 to satisfy Equation (6), and preferably, it is suggested tobe within 3.30˜15.70.

Reference is now made to Equation (7). As mentioned before, consideringthat the shortening of CT1 and CT2 have less potential and theshortening of CT6 has more potential relatively, here the value of(CT1+CT2)/CT6 is suggested for a lower limit to configure the value ofCT1, CT2 and CT6 properly, such as 2.00 to satisfy Equation (7), andpreferably, it is suggested to be within 2.00˜5.50.

Reference is now made to Equation (8). As mentioned before, consideringthat the shortening of AC34 have less potential and the shortening ofCT6 has more potential relatively, here the value of AC34/CT6 issuggested for a lower limit to configure the value of AC34 and CT6properly, such as 1.00 to satisfy Equation (8), and preferably, it issuggested to be within 1.00˜3.30.

Reference is now made to Equation (9). As mentioned before, consideringthat the shortening of AC34 and CT1 have less potential and theshortening of CT3 has more potential relatively because of its negativerefracting power, here the value of (CT1+AC34)/CT3 is suggested for alower limit, such as 2.20 to satisfy Equation (9), and preferably, it issuggested to be within 2.20˜5.50.

Reference is now made to Equation (10). Considering the shortening ofAC12 has less potential compared with the shortening of AC45 due to theposition of the aperture stop, which is between the first and secondlens element, here the value of AC12/AC45 is suggested for a lowerlimit, such as 0.90 to satisfying Equation (10), and preferably, it issuggested to be within 0.90˜2.50.

Reference is now made to Equation (11). Considering that the opticalcharacters and the manufacture difficulty of the optical imaging lens,here the value of (CT2+CT4)/CT5 is suggested for a lower limit toconfigure the value of CT2, CT4 and CT5 properly, such as 1.70 tosatisfying Equation (11), and preferably, it is suggested to be within1.70˜6.70.

Reference is now made to Equations (12) and (12′). As mentioned before,considering that the shortening of AC34 and CT1 have less potential andthe shortening of CT5 has more potential relatively, here the value of(CT1+AC34)/CT5 is suggested for a lower limit to configure the value ofCT1, CT5 and AC34 properly, such as 1.80 to satisfy Equation (12) or2.20 to satisfy Equation (12′), and preferably, it is suggested to bewithin 1.80˜6.70.

Reference is now made to Equation (13). Considering that the opticalcharacters and the manufacture difficulty of the optical imaging lens,here the value of AC34/(AC23+AC56) is suggested for a lower limit toconfigure the value of AC23, AC34 and AC56 properly, such as 1.80 tosatisfying Equation (13), and preferably, it is suggested to be within1.80˜8.50.

Reference is now made to Equation (14). As mentioned before, consideringthat the shortening of AC34 and CT5 have less potential and theshortening of CT5 has more potential relatively, here the value ofAC34/CT5 is suggested for a lower limit to configure the value of CT5and AC34 properly, such as 1.00 to satisfy Equation (14), andpreferably, it is suggested to be within 1.00˜3.50.

Reference is now made to Equation (15). Considering that the shorteningof CT4 has less potential due to the great diameter for passing lightthereon and the shortening of AC23 and AC56 have more potentialrelatively, here the value of CT4/(AC23+AC56) is suggested for a lowerlimit to shorten the length of the optical imaging lens, such as 1.00 tosatisfy Equation (15), and preferably, it is suggested to be within1.00˜11.00.

Reference is now made to Equation (16). Considering that the shorteningof CT3 has more potential due to the negative refracting power and thesmaller diameter for passing light thereon, here the value of(CT2+AC34)/CT3 is suggested for a lower limit to shorten the length ofthe optical imaging lens, such as 2.80 to satisfy Equation (16), andpreferably, it is suggested to be within 2.80˜5.80.

Reference is now made to Equation (17). Considering that the opticalcharacters and the manufacture difficulty of the optical imaging lens,here the value of (CT1+CT4)/CT5 is suggested for a lower limit toconfigure the value of CT1, CT4 and CT5 properly, such as 1.80 tosatisfying Equation (17), and preferably, it is suggested to be within1.80˜7.50.

When implementing example embodiments, more details about the convex orconcave surface structure may be incorporated for one specific lenselement or broadly for plural lens elements to enhance the control forthe system performance and/or resolution, as illustrated in thefollowing embodiments. It is noted that the additional details could beincorporated in example embodiments if no inconsistency occurs.

Several exemplary embodiments and associated optical data will now beprovided for illustrating example embodiments of optical imaging lenswith good optical characters and a shortened length. Reference is nowmade to FIGS. 2-5. FIG. 2 illustrates an example cross-sectional view ofan optical imaging lens 1 having six lens elements of the opticalimaging lens according to a first example embodiment. FIG. 3 showsexample charts of longitudinal spherical aberration and other kinds ofoptical aberrations of the optical imaging lens 1 according to anexample embodiment. FIG. 4 illustrates an example table of optical dataof each lens element of the optical imaging lens 1 according to anexample embodiment. FIG. 5 depicts an example table of aspherical dataof the optical imaging lens 1 according to an example embodiment.

As shown in FIG. 2, the optical imaging lens 1 of the present embodimentcomprises, in order from an object side A1 to an image side A2 along anoptical axis, a first lens element 110, an aperture stop 100, a secondlens element 120, a third lens element 130, a fourth lens element 140, afifth lens element 150 and a sixth lens element 16. A filtering unit 170and an image plane 180 of an image sensor are positioned at the imageside A2 of the optical lens 1. Each of the first, second, third, fourth,fifth, sixth lens elements 110, 120, 130, 140, 150, 160 and thefiltering unit 170 comprises an object-side surface111/121/131/141/151/161/171 facing toward the object side A1 and animage-side surface 112/122/132/142/152/162/172 facing toward the imageside A2. The example embodiment of the filtering unit 170 illustrated isan IR cut filter (infrared cut filter) positioned between the sixth lenselement 160 and an image plane 180. The filtering unit 170 selectivelyabsorbs light with specific wavelength from the light passing opticalimaging lens 1. For example, IR light is absorbed, and this willprohibit the IR light which is not seen by human eyes from producing animage on the image plane 180.

Please noted that during the normal operation of the optical imaginglens 1, the distance between any two adjacent lens elements of thefirst, second, third, fourth, fifth, sixth lens elements 110, 120, 130,140, 150, 160 is a unchanged value, i.e. the optical imaging lens 1 is aprime lens.

Exemplary embodiments of each lens element of the optical imaging lens 1which may be constructed by plastic material will now be described withreference to the drawings.

An example embodiment of the first lens element 110 may have positiverefracting power. The object-side surface 111 is a convex surfacecomprising a convex portion 1111 in a vicinity of the optical axis, andthe image-side surface 112 is a concave surface.

An example embodiment of the second lens element 120 may have positiverefracting power. Both of the object-side surface 121 and image-sidesurface 122 are convex surfaces, and the image-side surface 122 furthercomprises a convex portion 1221 in a vicinity of a periphery of thesecond lens element 120.

An example embodiment of the third lens element 130 may have negativerefracting power. Both of the object-side surface 131 and image-sidesurface 132 are concave surfaces.

An example embodiment of the fourth lens element 140 may have positiverefracting power. The object-side surface 141 is a concave surface. Theimage-side surface 142 is a convex surface comprising a convex portion1421 in a vicinity of a periphery of the fourth lens element 140.

An example embodiment of the fifth lens element 150 may have positiverefracting power. The object-side surface 151 is a concave surface, andthe image-side surface 152 is a convex surface.

An example embodiment of the sixth lens element 160 may have negativerefracting power. The object-side surface 161 comprises a concaveportion 1611 in a vicinity of the optical axis and a convex portion 1612in a vicinity of a periphery of the sixth lens element 160. Theimage-side surface 162 comprises a concave portion 1621 in a vicinity ofthe optical axis and a convex portion 1622 in a vicinity of a peripheryof the sixth lens element 160.

In example embodiments, air gaps exist between the lens elements 110,120, 130, 140, 150, 160, the filtering unit 170 and the image plane 180of the image sensor. For example, FIG. 1 illustrates the air gap d1existing between the first lens element 110 and the second lens element120, the air gap d2 existing between the second lens element 120 and thethird lens element 130, the air gap d3 existing between the third lenselement 130 and the fourth lens element 140, the air gap d4 existingbetween the fourth lens element 140 and the fifth lens element 150, theair gap d5 existing between the fifth lens element 150 and the sixthlens element 160, the air gap d6 existing between the sixth lens element160 and the filtering unit 170 and the air gap d7 existing between thefiltering unit 170 and the image plane 180 of the image sensor. However,in other embodiments, any of the aforesaid air gaps may or may notexist. For example, the profiles of opposite surfaces of any twoadjacent lens elements may correspond to each other, and in suchsituation, the air gap may not exist. The air gap d1 is denoted by AC12,the air gap d2 is denoted by AC23, the air gap d3 is denoted by AC34,the air gap d4 is denoted by AC45, and the air gap d5 is denoted byAC56.

FIG. 4 depicts the optical characters of each lens elements in theoptical imaging lens 1 of the present embodiment, wherein the values of(CT4+AC34)/CT3, AC34/(AC45+AC56), (CT1+AC34)/CT6, AC34/CT3,(CT2+CT4)/CT6, AC34/AC23, (CT1+CT2)/CT6, AC34/CT6, (CT1+AC34)/CT3,AC12/AC45, (CT2+CT4)/CT5, (CT1+AC34)/CT5, AC34/(AC23+AC56), AC34/CT5,CT4/(AC23+AC56), (CT2+AC34)/CT3 and (CT1+CT4)/CT5 are:

(CT4+AC34)/CT3=4.99;

AC34/(AC45+AC56)=2.00;

(CT1+AC34)/CT6=2.35;

AC34/CT3=2.36;

(CT2+CT4)/CT6=2.70;

AC34/AC23=5.78;

(CT1+CT2)/CT6=2.39;

AC34/CT6=1.26;

(CT1+AC34)/CT3=4.40;

AC12/AC45=1.59;

(CT2+CT4)/CT5=2.75;

(CT1+AC34)/CT5=2.40;

AC34/(AC23+AC56)=2.22;

AC34/CT5=1.28;

CT4/(AC23+AC56)=2.48;

(CT2+AC34)/CT3=4.78;

(CT1+CT4)/CT5=2.55.

The distance from the object-side surface 111 of the first lens element110 to the image plane 180 along the optical axis is 5.32 mm, and thelength of the optical imaging lens 1 is shortened.

The aspherical surfaces, including the object-side surface 111 and theimage-side surface 112 of the first lens element 110, the object-sidesurface 121 and the image-side surface 122 of the second lens element120, the object-side surface 131 and the image-side surface 132 of thethird lens element 130, the object-side surface 141 and the image-sidesurface 142 of the fourth lens element 140, the object-side surface 151and the image-side surface 152 of the fifth lens element 150 and theobject-side surface 161 and the image-side surface 162 of the sixth lenselement 160 are all defined by the following aspherical formula:

${Z(Y)} = {{\frac{Y^{2}}{R}/( {1 + \sqrt{1 - {( {1 + K} )\frac{Y^{2}}{R^{2}}}}} )} + {\sum\limits_{i = 1}^{n}\; {a_{2\; i} \times Y^{2\; i}}}}$

wherein,

R represents the radius of curvature of the surface of the lens element;

Z represents the depth of the aspherical surface (the perpendiculardistance between the point of the aspherical surface at a distance Yfrom the optical axis and the tangent plane of the vertex on the opticalaxis of the aspherical surface);

Y represents the perpendicular distance between the point of theaspherical surface and the optical axis;

K represents a conic constant;

a_(2i) represents an aspherical coefficient of 2i^(th) order.

The values of each aspherical parameter are shown in FIG. 5.

As illustrated in FIG. 3, longitudinal spherical aberration (a), thecurves of different wavelengths are closed to each other. Thisrepresents off-axis light with respect to these wavelengths is focusedaround an image point. From the vertical deviation of each curve showntherein, the offset of the off-axis light relative to the image point iswithin ±0.06 mm. Therefore, the present embodiment improves thelongitudinal spherical aberration with respect to different wavelengths.

Please refer to FIG. 3, astigmatism aberration in the sagittal direction(b) and astigmatism aberration in the tangential direction (c). Thefocus variation with respect to the three wavelengths in the whole fieldfalls within ±0.12 mm. This reflects the optical imaging lens 1 of thepresent embodiment eliminates aberration effectively. Additionally, theclosed curves represents dispersion is improved.

Please refer to FIG. 3, distortion aberration (d), which showing thevariation of the distortion aberration is within ±2.0%. Such distortionaberration meets the requirement of acceptable image quality and showsthe optical imaging lens 1 of the present embodiment could restrict thedistortion aberration to raise the image quality even though the lengthof the optical imaging lens 1 is shortened to 5.32 mm.

Therefore, the optical imaging lens 1 of the present embodiment showsgreat characteristics in the longitudinal spherical aberration,astigmatism in the sagittal direction, astigmatism in the tangentialdirection, and distortion aberration. According to above illustration,the optical imaging lens 1 of the example embodiment indeed achievesgreat optical performance and the length of the optical imaging lens 1is effectively shortened.

Reference is now made to FIGS. 6-9. FIG. 6 illustrates an examplecross-sectional view of an optical imaging lens 2 having six lenselements of the optical imaging lens according to a second exampleembodiment. FIG. 7 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 2 according to the second example embodiment. FIG. 8 shows anexample table of optical data of each lens element of the opticalimaging lens 2 according to the second example embodiment. FIG. 9 showsan example table of aspherical data of the optical imaging lens 2according to the second example embodiment. The reference numberslabeled in the present embodiment are similar to those in the firstembodiment for the similar elements, but here the reference numbers areinitialed with 2, for example, reference number 231 for labeling theobject-side surface of the third lens element 230, reference number 232for labeling the image-side surface of the third lens element 230, etc.

As shown in FIG. 6, the optical imaging lens 2 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises a first lens element 210, an aperture stop200, a second lens element 220, a third lens element 230, a fourth lenselement 240, a fifth lens element 250 and a sixth lens element 260.

The differences between the second embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the configuration of the concave/convexshape of the object-side surface 261, but the configuration of thepositive/negative refracting power of the first, second, third, fourth,fifth and sixth lens elements 210, 220, 230, 240, 250, 260 andconfiguration of the concave/convex shape of surfaces, comprising theobject-side surfaces 211, 221, 231, 241, 251 facing to the object sideA1 and the image-side surfaces 212, 222, 232, 242, 252, 262 facing tothe image side A2, are similar to those in the first embodiment.Specifically, the object-side surface 261 of the sixth lens element 260is a concave surface. Please refer to FIG. 8 for the opticalcharacteristics of each lens elements in the optical imaging lens 2 ofthe present embodiment, wherein the values of (CT4+AC34)/CT3,AC34/(AC45+AC56), (CT1+AC34)/CT6, AC34/CT3, (CT2+CT4)/CT6, AC34/AC23,(CT1+CT2)/CT6, AC34/CT6, (CT1+AC34)/CT3, AC12/AC45, (CT2+CT4)/CT5,(CT1+AC34)/CT5, AC34/(AC23+AC56), AC34/CT5, CT4/(AC23+AC56),(CT2+AC34)/CT3 and (CT1+CT4)/CT5 are:

(CT4+AC34)/CT3=5.08;

AC34/(AC45+AC56)=1.67;

(CT1+AC34)/CT6=5.59;

AC34/CT3=2.55;

(CT2+CT4)/CT6=5.32;

AC34/AC23=10.74;

(CT1+CT2)/CT6=5.07;

AC34/CT6=2.93;

(CT1+AC34)/CT3=4.86;

AC12/AC45=0.99;

(CT2+CT4)/CT5=2.22;

(CT1+AC34)/CT5=2.33;

AC34/(AC23+AC56)=2.23;

AC34/CT5=1.22;

CT4/(AC23+AC56)=2.22;

(CT2+AC34)/CT3=4.64;

(CT1+CT4)/CT5=2.32.

The distance from the object-side surface 211 of the first lens element210 to the image plane 280 along the optical axis is 5.27 mm and thelength of the optical imaging lens 2 is shortened.

As shown in FIG. 7, the optical imaging lens 2 of the present embodimentshows great characteristics in longitudinal spherical aberration (a),astigmatism in the sagittal direction (b), astigmatism in the tangentialdirection (c), and distortion aberration (d). Therefore, according tothe above illustration, the optical imaging lens of the presentembodiment indeed shows great optical performance and the length of theoptical imaging lens 2 is effectively shortened.

Reference is now made to FIGS. 10-13. FIG. 10 illustrates an examplecross-sectional view of an optical imaging lens 3 having six lenselements of the optical imaging lens according to a third exampleembodiment. FIG. 11 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 3 according to the third example embodiment. FIG. 12 shows anexample table of optical data of each lens element of the opticalimaging lens 3 according to the third example embodiment. FIG. 13 showsan example table of aspherical data of the optical imaging lens 3according to the third example embodiment. The reference numbers labeledin the present embodiment are similar to those in the first embodimentfor the similar elements, but here the reference numbers are initialedwith 3, for example, reference number 331 for labeling the object-sidesurface of the third lens element 330, reference number 332 for labelingthe image-side surface of the third lens element 330, etc.

As shown in FIG. 10, the optical imaging lens 3 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises a first lens element 310, an aperture stop300, a second lens element 320, a third lens element 330, a fourth lenselement 340, a fifth lens element 350 and a sixth lens element 360.

The differences between the third embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the surface shape of the object-sidesurface 361, but the configuration of the positive/negative refractingpower of the first, second, third, fourth, fifth and sixth lens elements310, 320, 330, 340, 350, 360 and configuration of the concave/convexshape of surfaces, comprising the object-side surfaces 311, 321, 331,341, 351 facing to the object side A1 and the image-side surfaces 312,322, 332, 342, 352, 362 facing to the image side A2, are similar tothose in the first embodiment. Specifically, the object-side surface 361of the sixth lens element 360 comprises a convex portion 3611 in avicinity of the optical axis and a concave portion 3612 in a vicinity ofa periphery of the sixth lens element 360. Please refer to FIG. 12 forthe optical characteristics of each lens elements in the optical imaginglens 3 of the present embodiment, wherein the values of (CT4+AC34)/CT3,AC34/(AC45+AC56), (CT1+AC34)/CT6, AC34/CT3, (CT2+CT4)/CT6, AC34/AC23,(CT1+CT2)/CT6, AC34/CT6, (CT1+AC34)/CT3, AC12/AC45, (CT2+CT4)/CT5,(CT1+AC34)/CT5, AC34/(AC23+AC56), AC34/CT5, CT4/(AC23+AC56),(CT2+AC34)/CT3 and (CT1+CT4)/CT5 are:

(CT4+AC34)/CT3=5.70;

AC34/(AC45+AC56)=3.06;

(CT1+AC34)/CT6=2.24;

AC34/CT3=2.42;

(CT2+CT4)/CT6=2.85;

AC34/AC23=15.36;

(CT1+CT2)/CT6=2.30;

AC34/CT6=1.19;

(CT1+AC34)/CT3=4.58;

AC12/AC45=1.15;

(CT2+CT4)/CT5=3.29;

(CT1+AC34)/CT5=2.58;

AC34/(AC23+AC56)=8.06;

AC34/CT5=1.37;

CT4/(AC23+AC56)=10.89;

(CT2+AC34)/CT3=4.97;

(CT1+CT4)/CT5=3.06.

The distance from the object-side surface 311 of the first lens element310 to the image plane 380 along the optical axis is 5.40 mm and thelength of the optical imaging lens 3 is shortened.

As shown in FIG. 11, the optical imaging lens 3 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 3 is effectively shortened.

Reference is now made to FIGS. 14-17. FIG. 14 illustrates an examplecross-sectional view of an optical imaging lens 4 having six lenselements of the optical imaging lens according to a fourth exampleembodiment. FIG. 15 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 4 according to the fourth embodiment. FIG. 16 shows an exampletable of optical data of each lens element of the optical imaging lens 4according to the fourth example embodiment. FIG. 17 shows an exampletable of aspherical data of the optical imaging lens 4 according to thefourth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 4, forexample, reference number 431 for labeling the object-side surface ofthe third lens element 430, reference number 432 for labeling theimage-side surface of the third lens element 430, etc.

As shown in FIG. 14, the optical imaging lens 4 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises a first lens element 410, an aperture stop400, a second lens element 420, a third lens element 430, a fourth lenselement 440, a fifth lens element 450 and a sixth lens element 460.

The differences between the fourth embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the configuration of the concave/convexshape of the object-side surface 461, but the configuration of thepositive/negative refracting power of the first, second, third, fourth,fifth and sixth lens elements 410, 420, 430, 440, 450, 460 andconfiguration of the concave/convex shape of surfaces, comprising theobject-side surfaces 411, 421, 431, 441, 451 facing to the object sideA1 the image-side surfaces 412, 422, 432, 442, 452, 462 facing to theimage side A2, are similar to those in the first embodiment.Specifically, the object-side surface 461 of the sixth lens element 460is a concave surface. Please refer to FIG. 16 for the opticalcharacteristics of each lens elements in the optical imaging lens 4 ofthe present embodiment, wherein the values of (CT4+AC34)/CT3,AC34/(AC45+AC56), (CT1+AC34)/CT6, AC34/CT3, (CT2+CT4)/CT6, AC34/AC23,(CT1+CT2)/CT6, AC34/CT6, (CT1+AC34)/CT3, AC12/AC45, (CT2+CT4)/CT5,(CT1+AC34)/CT5, AC34/(AC23+AC56), AC34/CT5, CT4/(AC23+AC56),(CT2+AC34)/CT3 and (CT1+CT4)/CT5 are:

(CT4+AC34)/CT3=7.52;

AC34/(AC45+AC56)=4.56;

(CT1+AC34)/CT6=3.45;

AC34/CT3=3.28;

(CT2+CT4)/CT6=3.49;

AC34/AC23=14.58;

(CT1+CT2)/CT6=2.98;

AC34/CT6=1.73;

(CT1+AC34)/CT3=3.45;

AC12/AC45=0.96;

(CT2+CT4)/CT5=6.44;

(CT1+AC34)/CT5=6.35;

AC34/(AC23+AC56)=5.44;

AC34/CT5=3.18;

CT4/(AC23+AC56)=7.02;

(CT2+AC34)/CT3=5.68;

(CT1+CT4)/CT5=7.28.

The distance from the object-side surface 411 of the first lens element410 to the image plane 480 along the optical axis is 5.41 mm and thelength of the optical imaging lens 4 is shortened.

As shown in FIG. 15, the optical imaging lens 4 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 4 is effectively shortened.

Reference is now made to FIGS. 18-21. FIG. 18 illustrates an examplecross-sectional view of an optical imaging lens 5 having six lenselements of the optical imaging lens according to a fifth exampleembodiment. FIG. 19 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 5 according to the fifth embodiment. FIG. 20 shows an example tableof optical data of each lens element of the optical imaging lens 5according to the fifth example embodiment. FIG. 21 shows an exampletable of aspherical data of the optical imaging lens 5 according to thefifth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 5, forexample, reference number 531 for labeling the object-side surface ofthe third lens element 530, reference number 532 for labeling theimage-side surface of the third lens element 530, etc.

As shown in FIG. 18, the optical imaging lens 5 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises a first lens element 510, an aperture stop500, a second lens element 520, a third lens element 530, a fourth lenselement 540, a fifth lens element 550 and a sixth lens element 560.

The differences between the fifth embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the configuration of the concave/convexshape of the object-side surface 561, but the configuration of thepositive/negative refracting power of the first, second, third, fourth,fifth and sixth lens elements 510, 520, 530, 540, 550, 560 andconfiguration of the concave/convex shape of surfaces, comprising theobject-side surfaces 511, 521, 531, 541, 551 facing to the object sideA1 and the image-side surfaces 512, 522, 532, 542, 552, 562 facing tothe image side A2, are similar to those in the first embodiment.Specifically, the object-side surface 561 of the sixth lens element 560is a convex surface comprises a convex portion 5611 in a vicinity of theoptical axis and a concave portion 5612 in a vicinity of a periphery ofthe sixth lens element 560. Please refer to FIG. 20 for the opticalcharacteristics of each lens elements in the optical imaging lens 5 ofthe present embodiment, wherein the values of (CT4+AC34)/CT3,AC34/(AC45+AC56), (CT1+AC34)/CT6, AC34/CT3, (CT2+CT4)/CT6, AC34/AC23,(CT1+CT2)/CT6, AC34/CT6, (CT1+AC34)/CT3, AC12/AC45, (CT2+CT4)/CT5,(CT1+AC34)/CT5, AC34/(AC23+AC56), AC34/CT5, CT4/(AC23+AC56),(CT2+AC34)/CT3 and (CT1+CT4)/CT5 are:

(CT4+AC34)/CT3=4.73;

AC34/(AC45+AC56)=1.28;

(CT1+AC34)/CT6=2.47;

AC34/CT3=2.48;

(CT2+CT4)/CT6=2.53;

AC34/AC23=4.41;

(CT1+CT2)/CT6=2.49;

AC34/CT6=1.32;

(CT1+AC34)/CT3=4.66;

AC12/AC45=2.16;

(CT2+CT4)/CT5=2.57;

(CT1+AC34)/CT5=2.52;

AC34/(AC23+AC56)=1.17;

AC34/CT5=1.34;

CT4/(AC23+AC56)=1.06;

(CT2+AC34)/CT3=5.00;

(CT1+CT4)/CT5=2.39.

The distance from the object-side surface 511 of the first lens element510 to the image plane 580 along the optical axis is 5.40 mm and thelength of the optical imaging lens 5 is shortened.

As shown in FIG. 19, the optical imaging lens 5 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 5 is effectively shortened.

Reference is now made to FIGS. 22-25. FIG. 22 illustrates an examplecross-sectional view of an optical imaging lens 6 having six lenselements of the optical imaging lens according to a sixth exampleembodiment. FIG. 23 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 6 according to the sixth embodiment. FIG. 24 shows an example tableof optical data of each lens element of the optical imaging lens 6according to the sixth example embodiment. FIG. 25 shows an exampletable of aspherical data of the optical imaging lens 6 according to thesixth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 6, forexample, reference number 631 for labeling the object-side surface ofthe third lens element 630, reference number 632 for labeling theimage-side surface of the third lens element 630, etc.

As shown in FIG. 22, the optical imaging lens 6 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises a first lens element 610, an aperture stop600, a second lens element 620, a third lens element 630, a fourth lenselement 640, a fifth lens element 650 and a sixth lens element 660.

The differences between the sixth embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the configuration of the concave/convexshape of object-side surface 661, but the configuration of thepositive/negative refracting power of the first, second, third, fourth,fifth and sixth lens elements 610, 620, 630, 640, 650, 660 andconfiguration of the concave/convex shape of surfaces, comprising theobject-side surfaces 611, 621, 631, 641, 651 facing to the object sideA1 and the image-side surfaces 612, 622, 632, 642, 652, 662 facing tothe image side A2, are similar to those in the first embodiment.Specifically, the object-side surfaces 661 of the sixth lens element 660is a concave surface. Please refer to FIG. 24 for the opticalcharacteristics of each lens elements in the optical imaging lens 6 ofthe present embodiment, wherein the values of (CT4+AC34)/CT3,AC34/(AC45+AC56), (CT1+AC34)/CT6, AC34/CT3, (CT2+CT4)/CT6, AC34/AC23,(CT1+CT2)/CT6, AC34/CT6, (CT1+AC34)/CT3, AC12/AC45, (CT2+CT4)/CT5,(CT1+AC34)/CT5, AC34/(AC23+AC56), AC34/CT5, CT4/(AC23+AC56),(CT2+AC34)/CT3 and (CT1+CT4)/CT5 are:

(CT4+AC34)/CT3=5.45;

AC34/(AC45+AC56)=2.03;

(CT1+AC34)/CT6=2.48;

AC34/CT3=2.07;

(CT2+CT4)/CT6=4.27;

AC34/AC23=5.26;

(CT1+CT2)/CT6=3.16;

AC34/CT6=1.36;

(CT1+AC34)/CT3=3.76;

AC12/AC45=0.90;

(CT2+CT4)/CT5=3.23;

(CT1+AC34)/CT5=1.88;

AC34/(AC23+AC56)=2.06;

AC34/CT5=1.03;

CT4/(AC23+AC56)=3.36;

(CT2+AC34)/CT3=5.17;

(CT1+CT4)/CT5=2.53.

The distance from the object-side surface 611 of the first lens element610 to the image plane 680 along the optical axis is 5.30 mm and thelength of the optical imaging lens 6 is shortened.

As shown in FIG. 23, the optical imaging lens 6 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 6 is effectively shortened.

Reference is now made to FIGS. 26-29. FIG. 26 illustrates an examplecross-sectional view of an optical imaging lens 7 having six lenselements of the optical imaging lens according to a seventh exampleembodiment. FIG. 27 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 7 according to the seventh embodiment. FIG. 28 shows an exampletable of optical data of each lens element of the optical imaging lens 7according to the seventh example embodiment. FIG. 29 shows an exampletable of aspherical data of the optical imaging lens 7 according to theseventh example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 7, forexample, reference number 731 for labeling the object-side surface ofthe third lens element 730, reference number 732 for labeling theimage-side surface of the third lens element 730, etc.

As shown in FIG. 26, the optical imaging lens 7 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises a first lens element 710, an aperture stop700, a second lens element 720, a third lens element 730, a fourth lenselement 740, a fifth lens element 750 and a sixth lens element 760.

The differences between the seventh embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the configuration of the concave/convexshape of the object-side surface 761, but the configuration of thepositive/negative refracting power of the first, second, third, fourth,fifth and sixth lens elements 710, 720, 730, 740, 750, 760 andconfiguration of the concave/convex shape of surfaces, comprising theobject-side surfaces 711, 721, 731, 741, 751 facing to the object sideA1 and the image-side surfaces 712, 722, 732, 742, 752, 762 facing tothe image side A2, are similar to those in the first embodiment.Specifically, the object-side surface 761 of the sixth lens element 760comprises a convex portion 7611 in a vicinity of the optical axis, aconvex portion 7612 in a vicinity of a periphery of the sixth lenselement 760 and a concave portion 7613 between the vicinity of theoptical axis and the vicinity of a periphery of the sixth lens element760. Please refer to FIG. 28 for the optical characteristics of eachlens elements in the optical imaging lens 7 of the present embodiment,wherein the values of (CT4+AC34)/CT3, AC34/(AC45+AC56), (CT1+AC34)/CT6,AC34/CT3, (CT2+CT4)/CT6, AC34/AC23, (CT1+CT2)/CT6, AC34/CT6,(CT1+AC34)/CT3, AC12/AC45, (CT2+CT4)/CT5, (CT1+AC34)/CT5,AC34/(AC23+AC56), AC34/CT5, CT4/(AC23+AC56), (CT2+AC34)/CT3 and(CT1+CT4)/CT5 are:

(CT4+AC34)/CT3=4.97;

AC34/(AC45+AC56)=1.97;

(CT1+AC34)/CT6=2.37;

AC34/CT3=1.81;

(CT2+CT4)/CT6=3.74;

AC34/AC23=4.64;

(CT1+CT2)/CT6=3.10;

AC34/CT6=1.09;

(CT1+AC34)/CT3=3.92;

AC12/AC45=1.55;

(CT2+CT4)/CT5=3.42;

(CT1+AC34)/CT5=2.17;

AC34/(AC23+AC56)=1.97;

AC34/CT5=1.00;

CT4/(AC23+AC56)=3.45;

(CT2+AC34)/CT3=4.83;

(CT1+CT4)/CT5=2.92.

The distance from the object-side surface 711 of the first lens element710 to the image plane 780 along the optical axis is 5.40 mm and thelength of the optical imaging lens 7 is shortened.

As shown in FIG. 27, the optical imaging lens 7 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 7 is effectively shortened.

Reference is now made to FIGS. 30-33. FIG. 30 illustrates an examplecross-sectional view of an optical imaging lens 8 having six lenselements of the optical imaging lens according to an eighth exampleembodiment. FIG. 31 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 8 according to the eighth embodiment. FIG. 32 shows an exampletable of optical data of each lens element of the optical imaging lens 8according to the eighth example embodiment. FIG. 33 shows an exampletable of aspherical data of the optical imaging lens 8 according to theeighth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 8, forexample, reference number 831 for labeling the object-side surface ofthe third lens element 830, reference number 832 for labeling theimage-side surface of the third lens element 830, etc.

As shown in FIG. 30, the optical imaging lens 8 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises a first lens element 810, an aperture stop800, a second lens element 820, a third lens element 830, a fourth lenselement 840, a fifth lens element 850 and a sixth lens element 860.

The differences between the eighth embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the configuration of the concave/convexshape of object-side surface 861, but the configuration of thepositive/negative refracting power of the first, second, third, fourth,fifth and sixth lens elements 810, 820, 830, 840, 850, 860 andconfiguration of the concave/convex shape of surfaces, comprising theobject-side surfaces 811, 821, 831, 841, 851 facing to the object sideA1 and the image-side surfaces 812, 822, 832, 842, 852, 862 facing tothe image side A2, are similar to those in the first embodiment.Specifically, the object-side surface 861 of the sixth lens element 860comprises a convex portion 8611 in a vicinity of the optical axis and aconcave portion 8612 in a vicinity of a periphery of the sixth lenselement 860. Please refer to FIG. 32 for the optical characteristics ofeach lens elements in the optical imaging lens 8 of the presentembodiment, wherein the values of (CT4+AC34)/CT3, AC34/(AC45+AC56),(CT1+AC34)/CT6, AC34/CT3, (CT2+CT4)/CT6, AC34/AC23, (CT1+CT2)/CT6,AC34/CT6, (CT1+AC34)/CT3, AC12/AC45, (CT2+CT4)/CT5, (CT1+AC34)/CT5,AC34/(AC23+AC56), AC34/CT5, CT4/(AC23+AC56), (CT2+AC34)/CT3 and(CT1+CT4)/CT5 are:

(CT4+AC34)/CT3=2.99;

AC34/(AC45+AC56)=2.29;

(CT1+AC34)/CT6=2.37;

AC34/CT3=1.42;

(CT2+CT4)/CT6=2.62;

AC34/AC23=6.12;

(CT1+CT2)/CT6=2.36;

AC34/CT6=1.25;

(CT1+AC34)/CT3=2.70;

AC12/AC45=1.82;

(CT2+CT4)/CT5=2.77;

(CT1+AC34)/CT5=2.51;

AC34/(AC23+AC56)=2.33;

AC34/CT5=1.32;

CT4/(AC23+AC56)=2.58;

(CT2+AC34)/CT3=2.82;

(CT1+CT4)/CT5=2.66.

The distance from the object-side surface 811 of the first lens element810 to the image plane 880 along the optical axis is 5.40 mm and thelength of the optical imaging lens 8 is shortened.

As shown in FIG. 31, the optical imaging lens 8 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 8 is effectively shortened.

Reference is now made to FIGS. 34-37. FIG. 34 illustrates an examplecross-sectional view of an optical imaging lens 9 having six lenselements of the optical imaging lens according to a ninth exampleembodiment. FIG. 35 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 9 according to the ninth embodiment. FIG. 36 shows an example tableof optical data of each lens element of the optical imaging lens 9according to the ninth example embodiment. FIG. 37 shows an exampletable of aspherical data of the optical imaging lens 9 according to theninth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 9, forexample, reference number 931 for labeling the object-side surface ofthe third lens element 930, reference number 932 for labeling theimage-side surface of the third lens element 930, etc.

As shown in FIG. 34, the optical imaging lens 9 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises a first lens element 910, an aperture stop900, a second lens element 920, a third lens element 930, a fourth lenselement 940, a fifth lens element 950 and a sixth lens element 960.

The differences between the ninth embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the configuration of the concave/convexshape of object-side surface 961, but the configuration of thepositive/negative refracting power of the first, second, third, fourth,fifth and sixth lens elements 910, 920, 930, 940, 950, 960 andconfiguration of the concave/convex shape of surfaces, comprising theobject-side surfaces 911, 921, 931, 941, 951 facing to the object sideA1 and the image-side surfaces 912, 922, 932, 942, 952, 962 facing tothe image side A2, are similar to those in the first embodiment.Specifically, the object-side surface 961 of the sixth lens element 960comprises a convex portion 9611 in a vicinity of the optical axis and aconcave portion 9612 in a vicinity of a periphery of the sixth lenselement 960. Please refer to FIG. 36 for the optical characteristics ofeach lens elements in the optical imaging lens 9 of the presentembodiment, wherein the values of (CT4+AC34)/CT3, AC34/(AC45+AC56),(CT1+AC34)/CT6, AC34/CT3, (CT2+CT4)/CT6, AC34/AC23, (CT1+CT2)/CT6,AC34/CT6, (CT1+AC34)/CT3, AC12/AC45, (CT2+CT4)/CT5, (CT1+AC34)/CT5,AC34/(AC23+AC56), AC34/CT5, CT4/(AC23+AC56), (CT2+AC34)/CT3 and(CT1+CT4)/CT5 are:

(CT4+AC34)/CT3=5.05;

AC34/(AC45+AC56)=2.72;

(CT1+AC34)/CT6=2.42;

AC34/CT3=2.51;

(CT2+CT4)/CT6=2.67;

AC34/AC23=6.26;

(CT1+CT2)/CT6=2.43;

AC34/CT6=1.32;

(CT1+AC34)/CT3=4.60;

AC12/AC45=1.98;

(CT2+CT4)/CT5=1.98;

(CT1+AC34)/CT5=1.80;

AC34/(AC23+AC56)=2.72;

AC34/CT5=0.98;

CT4/(AC23+AC56)=2.75;

(CT2+AC34)/CT3=5.05;

(CT1+CT4)/CT5=1.81.

The distance from the object-side surface 911 of the first lens element910 to the image plane 980 along the optical axis is 5.40 mm and thelength of the optical imaging lens 9 is shortened.

As shown in FIG. 35, the optical imaging lens 9 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 9 is effectively shortened.

Reference is now made to FIGS. 38-41. FIG. 38 illustrates an examplecross-sectional view of an optical imaging lens 10 having six lenselements of the optical imaging lens according to a tenth exampleembodiment. FIG. 39 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 10 according to the tenth embodiment. FIG. 40 shows an exampletable of optical data of each lens element of the optical imaging lens10 according to the tenth example embodiment. FIG. 41 shows an exampletable of aspherical data of the optical imaging lens 10 according to thetenth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 10, forexample, reference number 1031 for labeling the object-side surface ofthe third lens element 1030, reference number 1032 for labeling theimage-side surface of the third lens element 1030, etc.

As shown in FIG. 38, the optical imaging lens 10 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises a first lens element 1010, an aperture stop1000, a second lens element 1020, a third lens element 1030, a fourthlens element 1040, a fifth lens element 1050 and a sixth lens element1060.

The differences between the tenth embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the configuration of the concave/convexshape of object-side surface 1061, but the configuration of thepositive/negative refracting power of the first, second, third, fourth,fifth and sixth lens elements 1010, 1020, 1030, 1040, 1050, 1060 andconfiguration of the concave/convex shape of surfaces, comprising theobject-side surfaces 1011, 1021, 1031, 1041, 1051 facing to the objectside A1 and the image-side surfaces 1012, 1022, 1032, 1042, 1052, 1062facing to the image side A2, are similar to those in the firstembodiment. Specifically, the object-side surface 1061 of the sixth lenselement 1060 is a concave surface. Please refer to FIG. 40 for theoptical characteristics of each lens elements in the optical imaginglens 10 of the present embodiment, wherein the values of (CT4+AC34)/CT3,AC34/(AC45+AC56), (CT1+AC34)/CT6, AC34/CT3, (CT2+CT4)/CT6, AC34/AC23,(CT1+CT2)/CT6, AC34/CT6, (CT1+AC34)/CT3, AC12/AC45, (CT2+CT4)/CT5,(CT1+AC34)/CT5, AC34/(AC23+AC56), AC34/CT5, CT4/(AC23+AC56),(CT2+AC34)/CT3 and (CT1+CT4)/CT5 are:

(CT4+AC34)/CT3=6.86;

AC34/(AC45+AC56)=2.14;

(CT1+AC34)/CT6=2.61;

AC34/CT3=1.66;

(CT2+CT4)/CT6=3.83;

AC34/AC23=3.96;

(CT1+CT2)/CT6=2.93;

AC34/CT6=0.85;

(CT1+AC34)/CT3=5.11;

AC12/AC45=1.07;

(CT2+CT4)/CT5=6.14;

(CT1+AC34)/CT5=4.19;

AC34/(AC23+AC56)=2.01;

AC34/CT5=1.36;

CT4/(AC23+AC56)=6.32;

(CT2+AC34)/CT3=3.95;

(CT1+CT4)/CT5=7.10.

The distance from the object-side surface 1011 of the first lens element1010 to the image plane 1080 along the optical axis is 5.40 mm and thelength of the optical imaging lens 10 is shortened.

As shown in FIG. 35, the optical imaging lens 10 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 10 is effectively shortened.

Please refer to FIG. 42, which shows the values of (CT4+AC34)/CT3,AC34/(AC45+AC56), (CT1+AC34)/CT6, AC34/CT3, (CT2+CT4)/CT6, AC34/AC23,(CT1+CT2)/CT6, AC34/CT6, (CT1+AC34)/CT3, AC12/AC45, (CT2+CT4)/CT5,(CT1+AC34)/CT5, AC34/(AC23+AC56), AC34/CT5, CT4/(AC23+AC56),(CT2+AC34)/CT3 and (CT1+CT4)/CT5 of all nine embodiments, and it isclear that the optical imaging lens of the present invention satisfy theEquations (1), (2), (3), (4), (5), (6), (7), (8), (9), (10), (11),(12)/(12′), (13), (14), (15), (16) and/or (17).

Reference is now made to FIG. 43, which illustrates an examplestructural view of a first embodiment of mobile device 20 applying anaforesaid optical imaging lens. The mobile device 20 comprises a housing21 and a photography module 22 positioned in the housing 21. Examples ofthe mobile device 20 may be, but are not limited to, a mobile phone, acamera, a tablet computer, a personal digital assistant (PDA), etc.

As shown in FIG. 43, the photography module 22 may comprise an aforesaidoptical imaging lens with six lens elements, which is a prime lens andfor example the optical imaging lens 1 of the first embodiment, a lensbarrel 23 for positioning the optical imaging lens 1, a module housingunit 24 for positioning the lens barrel 23, a substrate 182 forpositioning the module housing unit 24, and an image sensor 181 which ispositioned at an image side of the optical imaging lens 1. The imageplane 180 is formed on the image sensor 181.

In some other example embodiments, the structure of the filtering unit170 may be omitted. In some example embodiments, the housing 21, thelens barrel 23, and/or the module housing unit 24 may be integrated intoa single component or assembled by multiple components. In some exampleembodiments, the image sensor 181 used in the present embodiment isdirectly attached to a substrate 182 in the form of a chip on board(COB) package, and such package is different from traditional chip scalepackages (CSP) since COB package does not require a cover glass beforethe image sensor 181 in the optical imaging lens 1. Aforesaid exemplaryembodiments are not limited to this package type and could beselectively incorporated in other described embodiments.

The six lens elements 110, 120, 130, 140, 150, 160 are positioned in thelens barrel 23 in the way of separated by an air gap between any twoadjacent lens elements.

The module housing unit 24 comprises a lens backseat 2401 forpositioning the lens barrel 23 and an image sensor base 2406 positionedbetween the lens backseat 2401 and the image sensor 181. The lens barrel23 and the lens backseat 2401 are positioned along a same axis I-I′, andthe lens backseat 2401 is close to the outside of the lens barrel 23.The image sensor base 2406 is exemplarily close to the lens backseat2401 here. The image sensor base 2406 could be optionally omitted insome other embodiments of the present invention.

Because the length of the optical imaging lens 1 is merely 5.32 mm, thesize of the mobile device 20 may be quite small. Therefore, theembodiments described herein meet the market demand for smaller sizedproduct designs.

Reference is now made to FIG. 44, which shows another structural view ofa second embodiment of mobile device 20′ applying the aforesaid opticalimaging lens 1. One difference between the mobile device 20′ and themobile device 20 may be the lens backseat 2401 comprising a first seatunit 2402, a second seat unit 2403, a coil 2404 and a magnetic unit2405. The first seat unit 2402 is close to the outside of the lensbarrel 23, and positioned along an axis I-I′, and the second seat unit2403 is around the outside of the first seat unit 2402 and positionedalong with the axis I-I′. The coil 2404 is positioned between the firstseat unit 2402 and the inside of the second seat unit 2403. The magneticunit 2405 is positioned between the outside of the coil 2404 and theinside of the second seat unit 2403.

The lens barrel 23 and the optical imaging lens 1 positioned therein aredriven by the first seat unit 2402 for moving along the axis I-I′. Therest structure of the mobile device 20′ is similar to the mobile device20.

Similarly, because the length of the optical imaging lens 1, 5.32 mm, isshortened, the mobile device 20′ may be designed with a smaller size andmeanwhile good optical performance is still provided. Therefore, thepresent embodiment meets the demand of small sized product design andthe request of the market.

According to above illustration, it is clear that the mobile device andthe optical imaging lens thereof in example embodiments, throughcontrolling the detail structure and/or reflection power of the lenselements, the length of the optical imaging lens is effectivelyshortened and meanwhile good optical characters are still provided.

While various embodiments in accordance with the disclosed principlesbeen described above, it should be understood that they are presented byway of example only, and are not limiting. Thus, the breadth and scopeof exemplary embodiment(s) should not be limited by any of theabove-described embodiments, but should be defined only in accordancewith the claims and their equivalents issuing from this disclosure.Furthermore, the above advantages and features are provided in describedembodiments, but shall not limit the application of such issued claimsto processes and structures accomplishing any or all of the aboveadvantages.

Additionally, the section headings herein are provided for consistencywith the suggestions under 37 C.F.R. 1.77 or otherwise to provideorganizational cues. These headings shall not limit or characterize theinvention(s) set out in any claims that may issue from this disclosure.Specifically, a description of a technology in the “Background” is notto be construed as an admission that technology is prior art to anyinvention(s) in this disclosure. Furthermore, any reference in thisdisclosure to “invention” in the singular should not be used to arguethat there is only a single point of novelty in this disclosure.Multiple inventions may be set forth according to the limitations of themultiple claims issuing from this disclosure, and such claimsaccordingly define the invention(s), and their equivalents, that areprotected thereby. In all instances, the scope of such claims shall beconsidered on their own merits in light of this disclosure, but shouldnot be constrained by the headings herein.

What is claimed is:
 1. An optical imaging lens, sequencially from anobject side to an image side along an optical axis, comprising a firstlens element, an aperture stop, and second, third, fourth, fifth andsixth lens elements, each of said first, second, third, fourth, fifthand sixth lens elements having refracting power, an object-side surfacefacing toward the object side and an image-side surface facing towardthe image side, wherein said object-side surface of said first lenselement comprises a convex portion in a vicinity of the optical axis;said image-side surface of said second lens element comprises a convexportion in a vicinity of a periphery of the second lens element; saidthird lens element has negative refracting power; said image-sidesurface of said fourth lens element comprises a convex portion in avicinity of a periphery of the fourth lens element; said image-sidesurface of said sixth lens element comprises a concave portion in avicinity of the optical axis and a convex portion in a vicinity of aperiphery of the sixth lens element; and the optical imaging lenscomprises no other lens elements having refracting power.
 2. The opticalimaging lens according to claim 1, wherein a central thickness of thethird lens element along the optical axis is represented by CT3, acentral thickness of the fourth lens element along the optical axis isrepresented by CT4, an air gap between the third lens element and thefourth lens element along the optical axis is represented by AC34, andCT3, CT4 and AC34 satisfy the equation:2.20≦(CT4+AC34)/CT3.
 3. The optical imaging lens according to claim 2,wherein an air gap between the fourth lens element and the fifth lenselement along the optical axis is represented by AC45, an air gapbetween the fifth lens element and the sixth lens element along theoptical axis is represented by AC56, and AC34, AC45 and AC56 satisfy theequation:1.00≦AC34/(AC45+AC56).
 4. The optical imaging lens according to claim 3,wherein a central thickness of the first lens element along the opticalaxis is represented by CT1, a central thickness of the sixth lenselement along the optical axis is represented by CT6, and AC34, CT1 andCT6 satisfy the equation:2.00≦(CT1+AC34)/CT6.
 5. The optical imaging lens according to claim 3,wherein CT3 and AC34 satisfy the equation:1.60≦AC34/CT3.
 6. The optical imaging lens according to claim 5, whereina central thickness of the second lens element along the optical axis isrepresented by CT2, a central thickness of the sixth lens element alongthe optical axis is represented by CT6, and CT2, CT4 and CT6 satisfy theequation:2.48≦(CT2+CT4)/CT6.
 7. The optical imaging lens according to claim 3,wherein an air gap between the second lens element and the third lenselement along the optical axis is represented by AC23, and AC23 and AC34satisfy the equation:3.30≦AC34/AC23.
 8. The optical imaging lens according to claim 7,wherein a central thickness of the first lens element along the opticalaxis is represented by CT1, a central thickness of the second lenselement along the optical axis is represented by CT2, a centralthickness of the sixth lens element along the optical axis isrepresented by CT6, and CT1, CT2 and CT6 satisfy the equation:2.00≦(CT1+CT2)/CT6.
 9. The optical imaging lens according to claim 2,wherein a central thickness of the sixth lens element along the opticalaxis is represented by CT6, and AC34 and CT6 satisfy the equation:1.00≦AC34/CT6.
 10. The optical imaging lens according to claim 1,wherein a central thickness of the first lens element along the opticalaxis is represented by CT1, a central thickness of the third lenselement along the optical axis is represented by CT3, an air gap betweenthe third lens element and the fourth lens element along the opticalaxis is represented by AC34, and CT1, CT3 and AC34 satisfy the equation:2.20≦(CT1+AC34)/CT3.
 11. The optical imaging lens according to claim 10,wherein an air gap between the first lens element and the second lenselement along the optical axis is represented by AC12, an air gapbetween the fourth lens element and the fifth lens element along theoptical axis is represented by AC45, and AC12 and AC45 satisfy theequation:0.90≦AC12/AC45.
 12. The optical imaging lens according to claim 11,wherein a central thickness of the second lens element along the opticalaxis is represented by CT2, a central thickness of the fourth lenselement along the optical axis is represented by CT4, a centralthickness of the fifth lens element along the optical axis isrepresented by CT5, and CT2, CT4 and CT5 satisfy the equation:1.70≦(CT2+CT4)/CT5.
 13. The optical imaging lens according to claim 10,wherein a central thickness of the fifth lens element along the opticalaxis is represented by CT5, and CT1, CT5 and AC34 satisfy the equation:1.80≦(CT1+AC34)/CT5.
 14. The optical imaging lens according to claim 13,wherein an air gap between the second lens element and the third lenselement along the optical axis is represented by AC23, an air gapbetween the fifth lens element and the sixth lens element along theoptical axis is represented by AC56, and AC23, AC34 and AC56 satisfy theequation:1.80≦AC34/(AC23+AC56).
 15. The optical imaging lens according to claim10, wherein a central thickness of the fifth lens element along theoptical axis is represented by CT5, and CT5 and AC34 satisfy theequation:1.00≦AC34/CT5.
 16. The optical imaging lens according to claim 1,wherein a central thickness of the fourth lens element along the opticalaxis is represented by CT4, an air gap between the second lens elementand the third lens element along the optical axis is represented byAC23, an air gap between the fifth lens element and the sixth lenselement along the optical axis is represented by AC56, and CT4, AC23 andAC56 satisfy the equation:1.00≦CT4/(AC23+AC56).
 17. The optical imaging lens according to claim16, wherein a central thickness of the second lens element along theoptical axis is represented by CT2, a central thickness of the thirdlens element along the optical axis is represented by CT3, an air gapbetween the third lens element the fourth lens element along the opticalaxis is represented by AC34, and CT2, CT3 and AC34 satisfy the equation:2.80≦(CT2+AC34)/CT3.
 18. The optical imaging lens according to claim 17,wherein a central thickness of the first lens element along the opticalaxis is represented by CT1, a central thickness of the fifth lenselement along the optical axis is represented by CT5, and CT1, CT4 andCT5 satisfy the equation:1.80≦(CT1+CT4)/CT5.
 19. The optical imaging lens according to claim 16,wherein a central thickness of the first lens element along the opticalaxis is represented by CT1, a central thickness of the fifth lenselement along the optical axis is represented by CT5, an air gap betweenthe third lens element and the fourth lens element along the opticalaxis is represented by AC34, and CT1, CT5 and AC34 satisfy the equation:2.20≦(CT1+AC34)/CT5.
 20. A mobile device, comprising: a housing; and aphotography module positioned in the housing and comprising: an opticalimaging lens, sequencially from an object side to an image side along anoptical axis, comprising a first lens element, an aperture stop, andsecond, third, fourth, fifth and sixth lens elements, each of saidfirst, second, third, fourth, fifth and sixth lens elements havingrefracting power, an object-side surface facing toward the object sideand an image-side surface facing toward the image side, wherein saidobject-side surface of said first lens element comprises a convexportion in a vicinity of the optical axis; said image-side surface ofsaid second lens element comprises a convex portion in a vicinity of aperiphery of the second lens element; said third lens element hasnegative refracting power; said image-side surface of said fourth lenselement comprises a convex portion in a vicinity of a periphery of thefourth lens element; said image-side surface of said sixth lens elementcomprises a concave portion in a vicinity of the optical axis and aconvex portion in a vicinity of a periphery of the sixth lens element;and the optical imaging lens comprises no other lens elements havingrefracting power; a lens barrel for positioning the optical imaginglens; a module housing unit for positioning the lens barrel; and animage sensor positioned at the image side of the optical imaging lens.